Experimental study on flow over sinusoidal and semicircular labyrinth weirs
- 19 July 2019
- journal article
- research article
- Published by Taylor & Francis Ltd in Ish Journal of Hydraulic Engineering
- Vol. 27 (sup1), 304-313
- https://doi.org/10.1080/09715010.2019.1644679
Abstract
For a given width, a labyrinth weir has a developed crest length, thereby increasing the flow capacity for a given upstream headwater. This paper experimentally studies the flow over labyrinth weirs with semicircular and sinusoidal configurations in a rectangular channel under a wide range of flow discharges. The effects of headwater ratio (HT/P), length of weir (L/P), arc radius ratio (R/P) and the number of cycles (N) on the discharge coefficient of semicircular and sinusoidal labyrinth weirs are investigated. Experimental results indicated the decreasing trend of Cd for HT/P>0.35 which is probably related to the progressive development of local submergence. Despite the effects of local submergence, the labyrinth weirs have nearly the same discharge coefficient as broad-crested weirs, and the flow discharge exceeded the linear weirs efficiency by ∼30. Additionally, reliable equations for estimating the discharge coefficient of labyrinth weirs with semicircular and sinusoidal configurations are presented.This publication has 25 references indexed in Scilit:
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